Institute of Environmental Engineering, The Faculty of Environmental Engineering and Geodesy, Wrocław University of Environmental and Life Sciences, Grunwaldzki Square 24, 50-363 Wrocław, Poland.
Department of Environmental Development and Protection, The Faculty of Environmental Engineering and Geodesy, Wrocław University of Environmental and Life Sciences, Grunwaldzki Square 24, 50-363 Wrocław, Poland.
Sci Total Environ. 2023 Aug 20;887:164153. doi: 10.1016/j.scitotenv.2023.164153. Epub 2023 May 12.
Rain gardens, as bioretention facilities belonging to blue-green infrastructure solutions, are becoming increasingly implemented in cities. The main reason for this is to support traditional drainage systems in receiving runoff from impermeable surfaces and managing it through temporary retention and infiltration into the ground. However, as practice shows, investors focusing on the construction of the systems and their commissioning skip their monitoring during the operating period, thus missing the opportunity to obtain reliable data on their hydrological performance under actual field conditions. The purpose of the study was to evaluate the effectiveness of a rain garden, located in an urban area, to capture runoff from the roof of a building. The assessment was based on the results of measurements carried out in 2021 on the variability of the levels of water retained in the rain garden and on measurements of growing medium moisture content at several selected points in the rain garden depression against thermal and rainfall conditions. The results showed that the rain garden demonstrated good hydrological performance. This was proven by the observed direct infiltration of rainwater into the structural layer or the short retention time for rainfall events with a higher rainfall total. The highest growing medium moisture was observed in the area of rainwater inflow to the rain garden. The results of the research may be useful in the planning and realization of future investments with rain gardens, which are to be situated in areas of similar meteorological conditions.
雨水花园作为属于蓝绿基础设施解决方案的生物滞留设施，在城市中越来越多地得到应用。主要原因是为了支持传统排水系统接收不透水面的径流，并通过临时滞留和渗透到地下进行管理。然而，正如实践所表明的那样，专注于系统建设和调试的投资者在运营期间忽略了对其进行监测，从而错过了在实际现场条件下获得其水文性能可靠数据的机会。本研究的目的是评估位于城市地区的雨水花园捕获建筑物屋顶径流的效果。评估基于 2021 年在雨水花园中保留的水位变化以及在几个选定的雨水花园凹陷点处的生长介质湿度测量结果，这些测量结果是根据热和降雨条件进行的。结果表明，雨水花园表现出良好的水文性能。这一点从雨水直接渗透到结构层或降雨总量较高的降雨事件的短滞留时间得到了证明。在雨水流入雨水花园的区域观察到了最高的生长介质湿度。研究结果可能对规划和实现未来的投资具有参考价值，这些投资将在类似气象条件的地区建设雨水花园。
